Senior Backend Engineer - PayLink

You design and build payment-critical backend services end to end on a modern Java stack, with a high bar for correctness, reliability and security. What you'll do - Design and build payment-critical backend services and APIs on Java / Spring Boot. - Ensure correctness and reliability under load. - Build robust integrations and event-driven flows. - Write thorough tests and help maintain high engineering standards. - Mentor mid-level engineers. Requirements - 5+ years in Java backend with Spring Boot. - Hands-on payments / fintech experience is required — you have worked on real payment or financial-transaction systems. - Hands-on experience with at least one payment processor or gateway (e.g. MPGS, Cybersource or mada). This is a requirement for this role. - Strong microservices and REST API design; relational databases. - Solid grasp of transactional integrity and reliability. - Containers / CI/CD and strong automated testing. - AI-augmented engineering — you actively use AI coding tools such as Claude Code in your day-to-day development. This is a requirement for this role. Nice to have - Experience with more than one payment processor / gateway. - Cloud platforms (OCI, AWS or Azure); Kafka.